Preparation of a hybrid preceramic precursor for Al-Si-C-N nanocomposites via a molecular building block approach

摘要

The reaction between (HAINPr(i))(m) (Pr-i=CH(CH3)(2)) and [MeSi(H)NH](n) (Me=CH3) led to hydrogen elimination to form a hybrid precursor. Thermogravimetry revealed that the ceramic yield of the hybrid precursor was much higher than those of (HAINPr(i))(m) and [MeSi(H)NH](n), which was ascribed to the hydrogen elimination condensation between the AIH groups in (HAINPr(i))(m) and the NH groups in [MeSi(H)NH](n) during precursor synthesis and pyrolysis. The pyrolyzed product under Ar was a mixture of beta-SiC, beta-Si3N4 and 2H wurtzite-type compound, and the particle sizes were in the range of 20-30 nm. [References: 21]